Abstract
Debris flow is the most serious and destructive geological disaster in the mountainous areas of Beijing. Statistical data on some antecedent and triggering rainfall for the occurrence of debris flow were collected, and the correlation between various rainfalls was analyzed in this research. The linear regression equations of rainfalls at different time periods were derived. Based on the statistical data of debris flow and rainfall from 1950 to 2012, the critical rainfall of debris flow in each districts of the mountainous areas in Beijing were computed by analyzing disaster and rainfall frequency, and the critical rainfall values of debris flow in Beijing were calculated and recommended in this research. The research results have important application value for the early warning and forecast of geological disaster in Beijing.
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